This could be late news to some people however for Office 365 there was an announcement this month of some tighter integration with Blackberry. Here is a new press on it - http://press.rim.com/release.jsp?id=5359
The “net” people should know about is that this service is available at no additional charge to current medium-sized or enterprise subscribers of the Office 365 suite or standalone Exchange Online and works with BlackBerry smartphones on business or consumer data plans.
This will ensure users can access email, calendar and organizer data from a Blackberry phone. Plus service has web-based management console that can provision, manage, and secure. Security features such as resetting passwords, and remote lock and wipe are supported.